CVE-2025-39754

Summary

In the Linux kernel, the following vulnerability has been resolved: mm/smaps: fix race between smaps_hugetlb_range and migration smaps_hugetlb_range() handles the pte without holdling ptl, and may be concurrenct with migration, leaing to BUG_ON in pfn_swap_entry_to_page(). The race is as follows. smaps_hugetlb_range migrate_pages huge_ptep_get remove_migration_ptes folio_unlock pfn_swap_entry_folio BUG_ON To fix it, hold ptl lock in smaps_hugetlb_range().

Impact & exploitability

CVSS:3.1/AV:L/AC:H/PR:L/UI:N/S:U/C:N/I:N/A:H

Affected products we track (1)

Recommendation

Apply the vendor fix in your normal patch cycle. Open any affected product above for its exact safe version.

Official patch: https://git.kernel.org/stable/c/09fc018f48871123ad5dbd7b03c956580232ed76 ↗

Additional information

• NVD record
• https://git.kernel.org/stable/c/09fc018f48871123ad5dbd7b03c956580232ed76Patch
• https://git.kernel.org/stable/c/2a1f3663974162b8f1e098196f557cfc1d160138Patch
• https://git.kernel.org/stable/c/45d19b4b6c2d422771c29b83462d84afcbb33f01Patch
• https://git.kernel.org/stable/c/b625883ccbcc2b57808db51d1375b1d7b9bcb3e5Patch
• https://git.kernel.org/stable/c/37ee0d97298b0547cb26b6957ccfea2d356bd0e7
• https://git.kernel.org/stable/c/f76089018b34dbe0c2e9b67c5b7d8860668748bb